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A default poller endpoint provides limited scheduling facilities. You can configure when the endpoint starts polling and the interval between polling attempts.
By default, poller endpoints begin polling as soon as they are started. You can control when a poller endpoint first attempts to poll the file system using an attribute that controls the date of the first polling attempt.
You specify a date for the first poll using the endpoint's firstTime attribute. The firstTime attribute specifies a date using the standard xsd:date format of YYYY-MM-DD. For example, you would specify April 1, 2025 as 2025-04-01. The first polling attempt will be made at 00:00:00 GMT on the specified date.
![[Note]](imagesdb/note.gif) | Note |
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If you schedule the first polling attempt in the past, the endpoint will begin polling immediately. |
Example 2.5 shows the configuration for a poller endpoint that starts polling at 1am GMT on April 1, 2010.
Example 2.5. Poller Endpoint with a Scheduled Start Time
<beans xmlns:file="http://servicemix.apache.org/file/1.0"
xmlns:foo="http://servicemix.org/demo/">
<file:poller service="foo:filePoller"
endpoint="filePoller"
targetService="foo:fileSender"
file="inbox"
firstTime="2010-04-01" />
...
</beans>In addition to controlling the specific data one which polling will start, you can also specify how long to delay the first polling attempt. The
delay is specified using the endpoint's delay attribute. The delay attribute specifies
the delay in milliseconds.
| Note |
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If you have specified a date for the first polling attempt, the delay will be added to the date to determine when to make the first polling attempt. |
Example 2.6 shows the configuration for a poller endpoint that begins polling 5 minutes after it is started.
Example 2.6. Poller Endpoint with a Delayed Start Time
<beans xmlns:file="http://servicemix.apache.org/file/1.0"
xmlns:foo="http://servicemix.org/demo/">
<file:poller service="foo:filePoller"
endpoint="filePoller"
targetService="foo:fileSender"
file="inbox"
delay="300000" />
...
</beans>By default, poller endpoints poll the file system every five seconds. You can configure the polling interval by providing a value for the endpoint's period attribute. The period attribute specifies the number of milliseconds the endpoint waits between polling attempts.
Example 2.7 shows the configuration for a poller endpoint that uses a thirty second polling interval.
Example 2.7. Poller Endpoint with a Thirty Second Polling Interval
<beans xmlns:file="http://servicemix.apache.org/file/1.0"
xmlns:foo="http://servicemix.org/demo/">
<file:poller service="foo:filePoller"
endpoint="filePoller"
targetService="foo:fileSender"
file="inbox"
period="30000" />
...
</beans>| |  | |
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